亚临界锅炉超低NO_x排放改造后高温腐蚀分析
|
摘要
某亚临界锅炉超低NO_x排放改造发生高温腐蚀情况,对其水冷壁贴壁气氛进行了测试,并采用模拟装置对腐蚀产物进行理化分析。结果表明:节点功能区、主燃烧区和燃尽区之间的还原区还原性气氛较强,2号角和4号角总体二次风量相对不足,这样增大了2个角附近区域的高温腐蚀;机组高-低负荷循环波动使高温腐蚀不断深入;若管材含有一定的Cr元素,可增强管材的抗腐蚀能力。在锅炉实际运行中,应改善二次风不均匀性,同时在腐蚀风险较高的区域合理应用含Cr元素管材。
In order to eliminate the high-temperature corrosion on water wall of a subcritical boiler after ultra low NO_x emission transformation, the atmosphere around the water wall was tested, and simulation device was employed to carry out physical and chemical analysis for the corrosion products. The results show that, the reducing atmosphere was strong at the node function area and the reducing zone between the main combustion zone and the burning-out zone. The overall secondary air volume at No.2 and No.4 corner was relatively insufficient, which increased the high temperature corrosion in the area near the two angles. The high-and low-load cycle fluctuation of the unit caused continuous deepening of high-temperature corrosion. The corrosion resistance of the pipe can be enhanced if the pipe contains a certain Cr element. In actual operation of the boiler,the non-uniformity of secondary air should be improved, and the Cr-containing pipe shall be reasonably applied in the areas with higher corrosion risk.
In order to eliminate the high-temperature corrosion on water wall of a subcritical boiler after ultra low NO_x emission transformation, the atmosphere around the water wall was tested, and simulation device was employed to carry out physical and chemical analysis for the corrosion products. The results show that, the reducing atmosphere was strong at the node function area and the reducing zone between the main combustion zone and the burning-out zone. The overall secondary air volume at No.2 and No.4 corner was relatively insufficient, which increased the high temperature corrosion in the area near the two angles. The high-and low-load cycle fluctuation of the unit caused continuous deepening of high-temperature corrosion. The corrosion resistance of the pipe can be enhanced if the pipe contains a certain Cr element. In actual operation of the boiler,the non-uniformity of secondary air should be improved, and the Cr-containing pipe shall be reasonably applied in the areas with higher corrosion risk.
引文
[1]许涛.600 MW对冲燃烧锅炉放高温腐蚀改造的数值模拟[D].保定:华北电力大学,2016:1-5.XU Tao.Numerical simulation of modification for high temperature sulfur corrosion in a 600 MW opposed firing boiler[D].Baoding:North China Electric Power University,2016:1-5.
[2]刘昕昶,鄢晓忠,刘泽龙,等.气氛条件对超临界锅炉水冷壁高温腐蚀的影响[J].过程工程学报,2017,17(4):763-770.LIU Xinchang,YAN Xiaozhong,LIU Zelong,et al.Influence of atmospheric conditions on high temperature corrosion of waterwall of supercritical boiler[J].The Chinese Journal of Process Engineering,2017,17(4):763-770.
[3]欧宗现,王超,张永和,等.低氮燃烧锅炉水冷壁高温腐蚀原因分析及对策[J].锅炉技术,2018,49(1):65-68.OU Zongxian,WANG Chao,ZHANG Yonghe,et al.Cause analysis of high temperature corrosion on water wall in boiler with low NOx combustion and countermeasures thereof[J].Boiler Technology,2018,49(1):65-68.
[4]吕洪坤,童家麟,常毅君,等.超超临界锅炉低NOx燃烧优化对高温腐蚀的影响[J].热能动力工程,2017,32(9):109-114.LV Hongkun,TONG Jialin,CHANG Yijun,et al.Influence of low NOx combustion optimization on the high-temperature corrosion for an ultra-supercritical boiler[J].Journal of Engineering for Thermal Energy and Power,2017,32(9):109-114.
[5]吕洪坤,李汝萍,童家麟,等.采用烟花示踪法控制水冷壁高温腐蚀试验[J].热力发电,2018,47(7):87-92.LYU Hongkun,LI Ruping,TONG Jialin,et al.Experimental study on controlling high-temperature corrosion of water-wall by fireworks tracer method[J].Thermal Power Generation,2018,47(7):87-92.
[6]PHONGPHIPHAT A,PYU C,YANG Y B,et al.Investigation into high-temperature corrosion in a large-scale municipal waste-to-energy plant[J].Corrosion Science,2010,52:3861-3874.
[7]吴超义.锅炉水冷壁高温腐蚀特性试验研究[D].杭州:浙江大学,2003:5-24.WU Chaoyi.Experimental study on high-temperature of water-wall for boilers[D].Hangzhou:Zhejiang University,2003:5-24.
[8]吕洪坤,童家麟,刘建忠,等.1 000 MW超超临界锅炉高温腐蚀分析及对策[J].北京工业大学学报,2017,43(3):481-488.LüHongkun,TONG Jialin,LIU Jianzhong,et al.Analysis and solution of high-temperature corrosion for a1 000 MW ultra-supercritical boiler[J].Journal of Beijing University of Technology,2017,43(3):481-488.
[9]ZHANG Q X,ZHANG Z X,CHENG D N,et al.High temperature corrosion of water wall material T23 and T24 in simulated furnace atmosphere[J].Chinese Journal of Chemical Engineering,2012,20(4):814-822.
[10]李汝萍,胡建根,吕洪坤,等.一种模拟水冷壁管在锅炉内运行状况的装置:201720663433.4[P].2017-12-15.LI Ruping,HU Jiangen,LüHongkun,et al.An equipment of imitating the running state of water-wall pipes:201720663433.4[P].2017-12-15.
[11]李汝萍,童家麟,齐晓娟.某亚临界锅炉低氮燃烧器改造后高温腐蚀控制[J].锅炉技术,2018,49(3):51-56.LI Ruping,TONG Jialin,QI Xiaojuan.The control of high-temperature corrosion after low NOx combustion retrofit for a subcritical boiler[J].Boiler Technology,2018,49(3):51-56.
[12]徐沁,王煜,毛洁.高压锅炉用碳钢SA210A-1、SA210C、20G比较分析[J].锅炉技术,2016,47(6):59-61.XU Qin,WANG Yu,MAO Jie.Comparison of SA210A-1,SA210C and 20G seamless steel tube used for high pressure boiler[J].Boiler Technology,2016,47(6):59-61.
[13]李江,周荣灿,唐丽英,等.超超临界燃煤锅炉水冷壁材料高温烟气腐蚀研究[J].热加工工艺,2017,46(16):19-24.LI Jiang,ZHOU Rongcan,TANG Liying,et al.Research on high temperature fireside corrosion of water wall materials for ultra-supercritical coal fired boiler[J].Hot Working Technology,2017,46(16):19-24.
[14]章雷其,汪湘晋,徐珂,等.基于柔性互联的源网荷储协同主动配电网设计研究[J].供用电,2018(1):28-33.ZHANG Leiqi,WANG Xiangjin,XU Ke,et al.Research on design of a source-grid-load-storage-collaborated active distribution network based on flexible interconnection[J].Distribution&Utilization,2018(1):28-33.
[15]董信光,孙健,孔庆雨,等.超临界350 MW机组直流锅炉深度调峰能力试验[J].热力发电,2018,47(7):105-112.DONG Xinguang,SUN Jian,KONG Qingyu,et al.Experimental study on depth peak-load regulation capacity of once-through boiler for a supercritical 350 MWunit[J].Thermal Power Generation,2018,47(7):105-112.
[16]毛志坚,唐有文.锅炉掉渣造成炉膛负压和汽包水位波动的分析和改善措施[J].华东电力,2008,36(10):114-116.MAO Zhijian,TANG Youwen.Analysis of furnace negative pressure and drum level fluctuation caused by boiler scaling-off and improvement measures[J].East China Electric Power,2008,36(10):114-116.
[2]刘昕昶,鄢晓忠,刘泽龙,等.气氛条件对超临界锅炉水冷壁高温腐蚀的影响[J].过程工程学报,2017,17(4):763-770.LIU Xinchang,YAN Xiaozhong,LIU Zelong,et al.Influence of atmospheric conditions on high temperature corrosion of waterwall of supercritical boiler[J].The Chinese Journal of Process Engineering,2017,17(4):763-770.
[3]欧宗现,王超,张永和,等.低氮燃烧锅炉水冷壁高温腐蚀原因分析及对策[J].锅炉技术,2018,49(1):65-68.OU Zongxian,WANG Chao,ZHANG Yonghe,et al.Cause analysis of high temperature corrosion on water wall in boiler with low NOx combustion and countermeasures thereof[J].Boiler Technology,2018,49(1):65-68.
[4]吕洪坤,童家麟,常毅君,等.超超临界锅炉低NOx燃烧优化对高温腐蚀的影响[J].热能动力工程,2017,32(9):109-114.LV Hongkun,TONG Jialin,CHANG Yijun,et al.Influence of low NOx combustion optimization on the high-temperature corrosion for an ultra-supercritical boiler[J].Journal of Engineering for Thermal Energy and Power,2017,32(9):109-114.
[5]吕洪坤,李汝萍,童家麟,等.采用烟花示踪法控制水冷壁高温腐蚀试验[J].热力发电,2018,47(7):87-92.LYU Hongkun,LI Ruping,TONG Jialin,et al.Experimental study on controlling high-temperature corrosion of water-wall by fireworks tracer method[J].Thermal Power Generation,2018,47(7):87-92.
[6]PHONGPHIPHAT A,PYU C,YANG Y B,et al.Investigation into high-temperature corrosion in a large-scale municipal waste-to-energy plant[J].Corrosion Science,2010,52:3861-3874.
[7]吴超义.锅炉水冷壁高温腐蚀特性试验研究[D].杭州:浙江大学,2003:5-24.WU Chaoyi.Experimental study on high-temperature of water-wall for boilers[D].Hangzhou:Zhejiang University,2003:5-24.
[8]吕洪坤,童家麟,刘建忠,等.1 000 MW超超临界锅炉高温腐蚀分析及对策[J].北京工业大学学报,2017,43(3):481-488.LüHongkun,TONG Jialin,LIU Jianzhong,et al.Analysis and solution of high-temperature corrosion for a1 000 MW ultra-supercritical boiler[J].Journal of Beijing University of Technology,2017,43(3):481-488.
[9]ZHANG Q X,ZHANG Z X,CHENG D N,et al.High temperature corrosion of water wall material T23 and T24 in simulated furnace atmosphere[J].Chinese Journal of Chemical Engineering,2012,20(4):814-822.
[10]李汝萍,胡建根,吕洪坤,等.一种模拟水冷壁管在锅炉内运行状况的装置:201720663433.4[P].2017-12-15.LI Ruping,HU Jiangen,LüHongkun,et al.An equipment of imitating the running state of water-wall pipes:201720663433.4[P].2017-12-15.
[11]李汝萍,童家麟,齐晓娟.某亚临界锅炉低氮燃烧器改造后高温腐蚀控制[J].锅炉技术,2018,49(3):51-56.LI Ruping,TONG Jialin,QI Xiaojuan.The control of high-temperature corrosion after low NOx combustion retrofit for a subcritical boiler[J].Boiler Technology,2018,49(3):51-56.
[12]徐沁,王煜,毛洁.高压锅炉用碳钢SA210A-1、SA210C、20G比较分析[J].锅炉技术,2016,47(6):59-61.XU Qin,WANG Yu,MAO Jie.Comparison of SA210A-1,SA210C and 20G seamless steel tube used for high pressure boiler[J].Boiler Technology,2016,47(6):59-61.
[13]李江,周荣灿,唐丽英,等.超超临界燃煤锅炉水冷壁材料高温烟气腐蚀研究[J].热加工工艺,2017,46(16):19-24.LI Jiang,ZHOU Rongcan,TANG Liying,et al.Research on high temperature fireside corrosion of water wall materials for ultra-supercritical coal fired boiler[J].Hot Working Technology,2017,46(16):19-24.
[14]章雷其,汪湘晋,徐珂,等.基于柔性互联的源网荷储协同主动配电网设计研究[J].供用电,2018(1):28-33.ZHANG Leiqi,WANG Xiangjin,XU Ke,et al.Research on design of a source-grid-load-storage-collaborated active distribution network based on flexible interconnection[J].Distribution&Utilization,2018(1):28-33.
[15]董信光,孙健,孔庆雨,等.超临界350 MW机组直流锅炉深度调峰能力试验[J].热力发电,2018,47(7):105-112.DONG Xinguang,SUN Jian,KONG Qingyu,et al.Experimental study on depth peak-load regulation capacity of once-through boiler for a supercritical 350 MWunit[J].Thermal Power Generation,2018,47(7):105-112.
[16]毛志坚,唐有文.锅炉掉渣造成炉膛负压和汽包水位波动的分析和改善措施[J].华东电力,2008,36(10):114-116.MAO Zhijian,TANG Youwen.Analysis of furnace negative pressure and drum level fluctuation caused by boiler scaling-off and improvement measures[J].East China Electric Power,2008,36(10):114-116.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |